Never at any of my former homes where I’ve maintained birdfeeders had I seen a warbler at the feeder. A few weeks at Merganser Lake and today alone I had three.
They were all Pine Warblers (the most likely warbler to be seen at a feeder) and all three toggled back and forth between the suet feeder and hopper feeder offering sunflower seeds. They seemed to favor the suet, however.
At one point all three were on the suet feeder at the same time, but they quickly chased each other away, leaving no one at the feeder.
It’s a thrill to see a warbler in the fall regardless, but at your feeder … so cool.